Senescence is the natural process of aging where cells gradually lose their ability to function optimally and to divide, leading to the physical and mental decline associated with aging. This biological progression contributes to increased vulnerability to diseases and ultimately death.
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Discrimination or prejudice against individuals based on their age, often targeted towards the elderly.
Life expectancy: The average period that a person is expected to live, which can be influenced by factors such as genetics, lifestyle, and healthcare quality